Eve is a powerful fighter whose nanites can help her to transform parts of her body into anything that she can think of. This makes her a very tough opponent to fight against because she can try out any kind of attack tactic. It’s a good thing for Kirito that he has fast reflexes eh? His Twin Blade style should allow him to parry Eve’s attacks long enough for him to get in a good hit. Eve’s attacks are strong, but she’s not nearly as fast as Kirito so she won’t be able to keep up. Kirito wins.